Peter L. Peres wrote:

> On Fri, 4 Sep 1998, Rawle Watson wrote:
>
> > Hi Everyone,
> >             I'm using an LM339 window comparator to send signals to a
> > PIC16F84-04. I did most of my testing during daylight hours and everything
> > worked well. But last night I realise that when either the florescence lamps
> > or the washing machine was turned ON, it switched the window comparator ON
> > thereby causing the Pic to false trigger.
> >         At first I thought this interference was passing through the
> > rectifier cct but I've since disconnected this and resort to a battery
> > supply but the problem still exists.
>
>  It could be your washing machine if it's a Fisher and Paykel... I've heard of
> people having a really bad time trying to receive sw radio because there
> neighbour has owned the above mentioned machine. The explanation was that the
> clock for the micro in the machine was running at 13.5 mhz and gave off a larg
er
> than normal signal which apparently flooded the receivers.

Hope this is of some use.Stuart